Just arrived the FP-S032n, after a few short listening sessions I can conclude that the cable has improved the quality.
The difference is not huge, but noticeable.
First was add bit the bass, just a little.
I have listen a song where the high frequency are a little cut off and confusing.
While this cable was not significantly reduced the high frequencies I would say it cleaned them up.
My impression seem that this cable add a sort of "filter" that clear the high frequency without reduce in a particularly perceptible way.
Before trying this cable I was worried about the hypothesis that it might reduce the high frequencies, it didn't, it made the sound more natural as if there were previously some disturbances in the high frequencies which are now reduced and less perceptible.
I raccomand this cable for every systems becouise don't change timbral, it increases the low frequencies only very slightly.